<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - effects - stereo</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<link type="text/css" rel="stylesheet" href="main.css">
	</head>

	<body>
		<div id="info">
			<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - effects - stereo. skybox by <a href="http://www.zfight.com/" target="_blank" rel="noopener">Jochum Skoglund</a>
		</div>

		<script type="module">

			import * as THREE from '../build/three.module.js';

			import { StereoEffect } from './jsm/effects/StereoEffect.js';

			let container, camera, scene, renderer, effect;

			const spheres = [];

			let mouseX = 0, mouseY = 0;

			let windowHalfX = window.innerWidth / 2;
			let windowHalfY = window.innerHeight / 2;

			document.addEventListener( 'mousemove', onDocumentMouseMove );

			init();
			animate();

			function init() {

				container = document.createElement( 'div' );
				document.body.appendChild( container );

				camera = new THREE.PerspectiveCamera( 60, window.innerWidth / window.innerHeight, 1, 100000 );
				camera.position.z = 3200;

				scene = new THREE.Scene();
				scene.background = new THREE.CubeTextureLoader()
					.setPath( 'textures/cube/Park3Med/' )
					.load( [ 'px.jpg', 'nx.jpg', 'py.jpg', 'ny.jpg', 'pz.jpg', 'nz.jpg' ] );

				const geometry = new THREE.SphereGeometry( 100, 32, 16 );

				const textureCube = new THREE.CubeTextureLoader()
					.setPath( 'textures/cube/Park3Med/' )
					.load( [ 'px.jpg', 'nx.jpg', 'py.jpg', 'ny.jpg', 'pz.jpg', 'nz.jpg' ] );
				textureCube.mapping = THREE.CubeRefractionMapping;

				const material = new THREE.MeshBasicMaterial( { color: 0xffffff, envMap: textureCube, refractionRatio: 0.95 } );

				for ( let i = 0; i < 500; i ++ ) {

					const mesh = new THREE.Mesh( geometry, material );
					mesh.position.x = Math.random() * 10000 - 5000;
					mesh.position.y = Math.random() * 10000 - 5000;
					mesh.position.z = Math.random() * 10000 - 5000;
					mesh.scale.x = mesh.scale.y = mesh.scale.z = Math.random() * 3 + 1;
					scene.add( mesh );

					spheres.push( mesh );

				}

				//

				renderer = new THREE.WebGLRenderer();
				renderer.setPixelRatio( window.devicePixelRatio );
				container.appendChild( renderer.domElement );

				effect = new StereoEffect( renderer );
				effect.setSize( window.innerWidth, window.innerHeight );

				//

				window.addEventListener( 'resize', onWindowResize );

			}

			function onWindowResize() {

				windowHalfX = window.innerWidth / 2;
				windowHalfY = window.innerHeight / 2;

				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();

				effect.setSize( window.innerWidth, window.innerHeight );

			}

			function onDocumentMouseMove( event ) {

				mouseX = ( event.clientX - windowHalfX ) * 10;
				mouseY = ( event.clientY - windowHalfY ) * 10;

			}

			//

			function animate() {

				requestAnimationFrame( animate );

				render();

			}

			function render() {

				const timer = 0.0001 * Date.now();

				camera.position.x += ( mouseX - camera.position.x ) * .05;
				camera.position.y += ( - mouseY - camera.position.y ) * .05;
				camera.lookAt( scene.position );

				for ( let i = 0, il = spheres.length; i < il; i ++ ) {

					const sphere = spheres[ i ];

					sphere.position.x = 5000 * Math.cos( timer + i );
					sphere.position.y = 5000 * Math.sin( timer + i * 1.1 );

				}

				effect.render( scene, camera );

			}

		</script>

	</body>
</html>
